The maximum value of $3 \cos \theta+4 \sin \theta$ is
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The maximum value of $3 \cos \theta+4 \sin \theta$ is

(A) 3

(B) 4

(C) 5

(D) None of these

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SOLUTION —

Maximum value of $3 \cos \theta+4 \sin \theta$

$=\sqrt{3^2+4^2}=5$

So, The correct option will be (C).

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